package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //对密码进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //设置分页参数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //执行查询
        List<Employee> employeeList = employeeMapper.pageQuery(employeePageQueryDTO);
        Page<Employee> employeeListPage = (Page<Employee>) employeeList;
        //返回结果
        return new PageResult(employeeListPage.getTotal(), employeeListPage.getResult());
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void insert(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置默认密码:123456,对用户的密码进行md5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置创建人和修改人(获取当前登录的用户id)
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        //设置账号状态:默认为正常
        employee.setStatus(StatusConstant.ENABLE);

        //设置创建时间和更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());

        employeeMapper.insert(employee);
    }

    /**
     * 根据id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.selectById(id);
    }



     /**
      * 更新员工信息
      */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateById(employee);
    }


     /**
      * 更新员工密码
      * @param passwordEditDTO
      */
    @Override
    public void updatePassword(PasswordEditDTO passwordEditDTO) {

        //根据员工id查询密码并比对原始密码
        Long empId = BaseContext.getCurrentId();
        Employee employee = employeeMapper.selectById(empId);
        //对原始密码进行md5加密
        String oldPassword = passwordEditDTO.getOldPassword();
        oldPassword = DigestUtils.md5DigestAsHex(oldPassword.getBytes());

        //判断密码是否正确
        if(!employee.getPassword().equals(oldPassword)){
            //原始密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        //设置新密码
        String newPassword = passwordEditDTO.getNewPassword();
        newPassword = DigestUtils.md5DigestAsHex(newPassword.getBytes());
        employee.setPassword(newPassword);

        //更新员工信息
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateById(employee);
    }

    @Override
    public void updateStatus(Integer status, Long id) {
        //构建员工对象
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();

        employeeMapper.updateById(employee);
    }
}
